We currently have a 4 node cluster and are looking to remove and re-purpose 2 of the nodes.
On the two passive nodes, I plan to remove the node from the failover cluster using SQL Server Installation Wizard, and then hand over to our Server team to remove the nodes from the cluster entirely.
Question is: Can this be safetly done while the database instance is being actively used on the active nodes, or should we shutdown the instance adn take a downtime to perform this maintenance?
I haven't been able to find any documentation to support this either way.